Subheater for hot-air furnaces.



No. 685,58l. Patented Oct. 29, I90I.

.1. DELLINGER.

SUBHEATEB FOB HOT AIR FURNACES.

(Application filed Sept. '7, 1900.)

Witnesses. Inventor.

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NTTED STATES PATENT FFICE.

SUBHEATER FOR HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 685,581, dated caster 29, 1901. Application filed September 7, 1900. Serial No; 29,316. (No model.)

To aZZ whom, it may concern:

Be it known that I, J OHN DELLINGER,a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Subheaters for Hot-Air Furnaces, of which the following is a specification.

My invention relates to an auxiliary or sub heating device for hot-air and analogous furnaces; and the object of the invention is to provide a convenient and cheap gas heating device which can be attached to a hot-air furnace and used for supplying heat through the pipes of said furnace during the early fall and spring months, which are not cold enough to require the heat of the hot-air furnace at all times of the day and night. By this means the consumption of coal is econ0mized,'as the furnace need not be starteduntil winter fairly sets in, and an economical and efficient means is provided for heating the house or dwelling in which the furnace is located during the-chilly portions of the day or night.

For a full understanding of the merits and advantages of the invention reference is to be had to the accompanying drawings and the following description.

The invention is susceptible to various changes in the form, proportion and minor details of construction without departing from the principle or sacrificing any of the advan-. .tages thereof, and to a full disclosure of the invention an adaptation thereof is shown in the accompanying drawings, in which-- Figure 1 represents a vertical central section through a hot-air furnace having my improved gas heating device connected thereto. Fig. 2 is a detached face view of one of the perforated diaphragmatic plates. Fig. 3 is a fragmentary section through one of the heatradiating drums. Fig. 4 is a fragment of one end of the conducting-pipe, illustrating the means for deflecting the heat from the pipe into the upper end of the furnace. Fig. 5 is a fragmentary section to illustrate the means for fastening the short connecting-pipes to the heat-radiating drums. Fig. 6 is a .detached view of a fragment of one of the drums looking in the direction of the arrow V, Fig.

5, also showing the end of one of the short edge.

for conducting the hot air to the various" rooms or apartments in the house or dwelling in which it is located.

The auxiliary or subheating'device is composed of a base 3, having a body'formed of two slightly-separated hollow portions 4 and 5, one of which surrounds the other. These hollow portions are provided with a closed top 6,-which slants slightly downward from one side, substantially as shown in Fig. 1.

Within the body is placed a gas-burner 7,

'which is mounted upon the base and is preferably of an annular form, and above this burner is arranged a series of heat-radiating drums. These drums are placed one above the other and connected by pipes. The lower drum 8 extends upward from the base 3 and is slightly conical in formation. A diaphragmatic plate 9 is placed horizontally over the top of the lower drum 8 and has a circular series of apertures or openings 10 near its outer .(See Fig. 2.) An intermediate tubular drum 11 is arranged above the plate 9, and a second diaphragmatic plate 12, of similar formation, is arranged upon the top of this drum 11. A truncated-cone portion 13 extends upward from the second diaphragmatic plate 12 and has a central opening at its reduced upper end. A short connecting-pipe 14 is passed throughsaid opening and extends vertically upward. The ends of this pipe are screw-threaded, and the truncated end of the cone is flattened, substantially as shown at 15 in Fig. 5, so that fastening-nuts 16 and 17 can be placed upon the opposite sides of said portion 15 and screwed against the same to rigidly lock the cone tothe pipe. One or more heat-radiating drums are arranged above this pipe and consist of two opposed truncated cones l8 and 19, having a diaphragmatic plate 20, similar to that shown in Fig. 2, arranged and fastened between their connecting edges. These opposed cones are preferably connected to each other at their edges by bending the edge of one around the edge of the other, substantially as shown in Fig. 3, and each radiating-drum is sup ported and connected to the adjacent drums by short connecting-pipes, similar to the connecting-pipe 14, heretofore described, and a pipe 21 extends from the upper heat-radiating drum through the top of the body and into the surroundingatmosphere. A pipe 22 for supplying cold air extends into the lower portion of the body, and a similar cold-aircondueting pipe 23 extends through the body and into the intermediate tubular drum 11.

A pipe is utilized to conduct the hot air from the body of the auxiliary or subheating device into the hot-air furnace. This pipe is preferably formed in two sections 24: and 25, which are coupled together by a screw-threaded sleeve 26, so that they can be readily separated to detach the subheater from the main furnace when it is not required. The end of the pipe portion 25 which extends into the main furnace is provided with a top opening 27, and a deflecting-cone 28 is placed in said pipe, substantially as shown in Figs. 1 and 4:, to deflect the hot air in different directions, and thus cause it to pass into the various pipes extending to the difierent rooms or apartments. bent diagonally downward to direct the heat to the cone 28 ,substantially as shown in Fig. 1.

In utilizing this device the gas-burner is lighted and the cold air enters into the lower portion of the body through the pipe 22 and is gradually heated by the heat thrown off or radiated from the drums as it passes up through the bodyand into the pipe portion 24.

It will be observed by reference to Fig. 1 that the heat products follow an approximately zigzag path as they pass through the heat-radiating drums, owing to the fact that the circular series of openings or apertures in the diaphragmatic plates are arranged near their edges, thus compelling the heat products to pass closely to the interior of the truncated cones of the drums.

I claim as my invention- 1. A gas-subheater having a base, a body A portion 29 of the pipe isesasi on said base, a burner within said body, a lower heat radiating drum inclosing said burner, a series of upper heat-radiating drums, an intermediate heat-radiating drum and each composed of a pair of truncated cones united by lap-joints and having openings at their truncations, a diaphragmaticplate between the cones of each drum, pipes having screwthreaded ends extending through said open ings and lock-nuts on said screw-threaded ends on opposite sides of the cone-surface, as set forth.

2. A hot-air furnace having heating-pipes extending to various apartments in the dwelling in which it is located, a subheater, a horizontal pipe connecting said subheater to the furnace and having a top opening within the furnace and a deflecting device in said pipe vertically below said opening.

3. A hot-air furnace having heating-pipes extending to various apartments in the dwelh ing in which it is located, a subheater, a pipe connecting said subheater to the furnace, and having a top opening within the furnace and a cone deflector in said pipe vertically below said opening.

4. A gas-subheater having a base, a body on said base, a burner Within said body, a series of heat-radiating drums above said burner, each composed of a pairof truncated cones united by lap-joints and having openings at their truncations, pipes having screwt-hreaded ends extending through said openings and lock-nuts on said screw-threaded ends on opposite sides of the cone-su rface, as set forth.

5. A hot-air furnace having heating-pipes extending to various apartments in the dwelling in which it is located, a subheater,- apipe connecting said subheater to the furnace and having an opening within the furnace, and a bent portion adjacent to said opening, and a 0 cone deflector arranged in the pipe vertically below the opening, as set forth.

JOHN DELLINGER. Witnesses:

L. M. BILLtNGs, G. A. NEUBAUEH. 

